Ubuntu
linux-lts-xenial package

  1. Bug #1598312
  2. Comment #30

Comment 30 for bug 1598312

Revision history for this message
In , lenb (lenb-linux-kernel-bugs) wrote :

acpi=noirq puts the system into PIC mode, while ACPI is able to put it in IOAPIC mode. Unclear why this has any effect on the problem at hand. Do you get the same result with simply "noapic"?

In both cases, powernow_k8 seems to load and print the same messages.

In the working and non-working cases, what do you see with

grep . /sys/devices/system/cpu/cpu0/cpufreq/*

What is the latest working kernel, and what is the first failing kernel? Can you git-bisect to what commit caused this to break?